我国无线电频率划分表划分给业余业务使用的最接近Ku波段卫星电视_爱下问搜题

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问题单项选择题

我国无线电频率划分表划分给业余业务使用的最接近Ku波段卫星电视广播频率的频带10-10.5GHz，属于无线电频谱的下列频带（波段）：（）

A.SHF

B.UHF

C.EHF

D.VHF

答案

参考答案：A

补全对话，情景问答

给下列的问句选择合适的答语。

( ) 1. What's the date today?
( ) 2. What time is it?
( ) 3. Are these your shoes?
( ) 4. Did you have a good trip?
( ) 5. Where is your dog?

A. It's 3: 30.
B. Yes, they are.
C. Yes, but I'm tired.
D. I don't know.
E. It's May first.

问答题简答题

二段转化炉大盖密封面划伤后如何处理？